Medicine Myasthenia Gravis and Muscular dystrophy a1de7b94 What is not useful for diagnosis of myasthenia gravis? A AChR antibodies B Voltage gated calcium channel antibodies C Muscle-specific kinase antibodies D Edrophonium test High-Yield Explanation Voltage-gated calcium channel antibodies are used for diagnosis of Lambe Eaton syndrome. Choices A, C,and D are used for diagnosis of M. Gravis.